Metal casting and process of making metal castings



May 29, 1 923.

D. CORDINO METAL CASTING AND PROCESS OF1MAKING METAL CASTINGS Filed my14. 1.922

Fig. 6.

Patented May 29, 1923.

DOMINiCK oonnrno, or PLYMOUTH, urnssnoinisirrr's.

METAL onsrrrio'nnn rn oonss or Martins asai. amines;

Application filed August 14, 1922. 1 semi no. 581,836.

ToaZZ whom it may concern:

Be it known that I, DOMINICK OORDTNO, a citizenof the United States,reslding at Plymouth, in the county oi: Plymouth and State ofMassachusetts, have invented new' and useful Improvements in MetalCastings" and Processes of Making Meta-l Castings,

of which the following is a specificationr My invention relates to themethod of making metal castings, and the object of tures of Variouskinds'in gas and oil-stoves and other castingsfor the purpose ofconcealing; the fastenings on the race of the work, .it is customary tocast a lug 'or lugs onthe inside of onecasting and to drill" a hole inthe lug'and then tap a screw thread therein for the reception of a boltor screw.

These-means are subject to a number of ob jecti'ons, and among them are:first, the

danger of forcingxtheidrill through the casting-and-thereby destroyingor defacing,

it; secondly, of breaking the' tap by not judging the distanceaccurately and by driving it against the bottom of the hole. In somesituations it is awkward to-use the drill and tap because of difficultyof access to the particular position of the lug, all of whichaccentuates the risk of forcing the drill through the casting andbreaking the tap, and also makes accurate drilling and tappingdifiicult, if not impossible.

My invention consists of a process of casting metal for the attainmentof the foregoing objects, of certain novel devices to be employed insuch process, and of the article produced by the process. I

In the accompanying drawing which illustrates some of the devices usedin practicing my process, Fig. lIis a perspective view of an attachmentto the pattern used in forming the mold; Fig. 2 is a perspective view ofa chaplet. incorporated into shown'in Fig. 4. Before making the mOl thecasting during the molding,p'rocess;;

chaplet and contents before casting, Fig.

4: is a plan View of a casting molded by? my process; Fig; 5' isaivertical section of one of the lugs? throughi the line in: .Fig; 6,which is an enlarged perspective elevation of one of'the lugs/7. j p

The first stepin my procejs s isitq Secure to-the pattern one'ormo'reattachments 16 like thatsh'ow'n in Fig."'1,mad e of suit able material,preferably brass,' the nuinber' and t of these ft whmen sa ein governedby the requirements ofif/qhg of a particular casting.Theseattachn'ientsj.

are in" the form of a socket'toreceiyie the chaplet 9.v The upward"extensions 13,1? ?3,

ot the attachments 1 6 are" of ulletlll ili heights; the extension 13?being shorter,

than the extension 13,so as: to provide an opening in the cast lug forthe" reception of a nut into the ehaplet.

Fig. 4: illustrates a casting S'deSigned' to, rave another castingorpanel secured to it' at the four points indicated the lugs 7. In moldingsuch a casting asf8, there'wou'ld' be four of the attachments 16 securedtoflthe patternin the same relation, of course, to each other as thelugsf'l', on' the castin a Chaplet 9, shown in Fig. 2,1:iiade of sheetmetal or other suitable material," is inserted in each attachment 16 onthe pattern. The" upper portion of the chap'let is'ffilled with a core11', as shown in Fig. 3,ca-pable of b e-' coming disintegrated by themolten metal,

but remaining intact during the molding,

process suificientlyl to prevent being. [dis-.1

placed by the pouring of the metal," Below the core 11 is a narrow space12 as, shown in Fig. 3. The chaplet'containing the core 11 is inserte d"in the attachment 16' in the pattern, with its open ends", adjacent tothe. upright portions 13, 13 of the'attjachment 16, whereby the molding.sand cannot enter the space 12 in the chaplet 9,.iduring the making ofthe mold. The attern is then placed in the molding sa'n in theusiialmanner for casting with the attachments 16 on the upper side of. thepattern, and when the cope is raised from the drag, the chaplet 9 beinglight and loosely resting in the at tachment 16, is lifted by the copeto which it adheres. The pattern is then removed from the drag, the copeis closed and the metal poured in the usual manner. 'By reaino son ofthe extension 13 of the attachment 16 being shorter than the extension13, and not reaching to the top of the chaplet, the cast lug is open atthe top on the side corresponding to the extension 13". The result isthat lugs like the lug 7 are cast, in which the space 12 in the chaplet9 is filled with metal which flows into the chaplet through the opening17, and the core 11 is so disintegrated by heat that it is readilyremoved. when the castings are rattled, leaving the upper portion of thechaplet 9, and the hole 18 therein open. The space left in the upperportion of the chaplet by the displacement of the core is sufficient toadmit a screw threaded nut 10 in the top, and to leave an open spacebelow it and above the metal 19 which forms the bottom of the chapletalter casting, as shown in Fig. 5. In Fig. 6 is shown the nut 10inserted in the chaplet 9. The chaplet 9 is flaring at the top for thepurpose of receiving the nut 10 and forming shoulders for supporting thenut 10 so as to leave the open space 14 below it. After the casting ismade, a nut 10 of suitable size and having a screw threaded hole,properly located to coincide with the hole 18 in the chaplet 9, isinserted into the top of the chaplet. It is desirable to have the nutfit snugly so as not to become easily displaced. This arrangementpermits of the removal of the nut at any time, if desired, andreplacement of a new one for the purpose oi making repairs.

Referring to the casting 8 in Fig. 4, each of the lugs is provided witha screw threaded hole 18 in its top to receive a screw or bolt 15 forthe purpose of securing another casting thereto. It is obvious that bythis method oi casting, the holes in the lugs are accurately located,that all danger of defacing the castingby accidentally drilling throughit is obviated, and as no tapping of the thread is required, there canbe no breakage of taps. The screws or bolts employed are selected withreference to their length, so as not to extend to the bottom of thespace let shown in Fig. 5. The screws or bolts are readily removed whenoccasion requires separation of the casting for repairs or otherpurposes.

The provision of the open space below the nut in the construction shownin the pending application, as well as in this ap plication, is of greatimportance in case it becomes necessary to remove the bolts or screwsfor the purpose of repairs for the reason that the end of the screw orbolt is free from contact with the casting, and

therefore does not become. adhered thereto by reason of corrosion. Whereno such space is provided it is often impossible to remove the bolt whendesired without breaking it or destroying the casting or requiringdrilling and tapping of the lug.

In my pending application above referred to, I have shown and describeda nut inserted in the chaplet before the casting is made and therebyfused into the lug or having the top of thechaplet itself suificient-lythick to admit of tapping a screw threaded hole therein and dispensingwith the use of a. separate nut, from each of which methods the presentinvention is distinguished. While having all the advantages of theformer it has the additional advantage that nuts of different sizes maybe selected for insertion into the lugs, and the nuts may be removed atany time for replacement when needed for repairs.

W hat I claim and desire to secure by Letters Patent is:

1. The hereinbefore described process of casting metals consisting offorming a mold having a chaplet incorporated therein, said chaplethaving openings on two sides, and having its upper portion filled with acore, and having a chamber located beneath the core, said mold beingformed so as to permit one of said openings to be closed and the otherto be partially closed with the molten metal, then pouring the moltenmetal into said mold and thereby filling said chamber and closing one ofsaid openings and partially closing the other, whereby the casting isprovided with a chamber closed at the bottom and with a side openingnear the top adapted to receive a screw threaded nut.

2. In a metal casting a chaplet having a chamber therein and havin noopening in its bottom througa the castlng, said chaplet being adapted toreceive and removably support a screw threaded nut in the upper part ofsaid chamber.

In a metal casting a chaplet having a screw threaded nut removablylocated in its top, combined with a chamber located beneath the nut andhaving no opening in its bottom. through the casting.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses, this eighth da of August, 1922.

DOM] NICK LOltDllNO.

\Vitnesses ELMER L. BRIcos, DORA ConnINo.

